Wood shaper



June 4, 1929.

O. ONSRUD wooD SHAPER w w z n w A 5 Sheets-Sheet 2 -welzr WOOD SHAPER O. ONSRUD Filed Jan. 16, 1928 June 4; 1929.

June 4, 1929. 0- ONSRUD 1,715,380

' wooD SHAPER Filed Jan. 1,6, 1928 3 Sheets-Sheet 3 Patented June 4, 1929.

invitan STATES Parnar4 orties.

OSCAR ONSRUD, OF CHICAGO, ILLINOIS, SSIGNOR TO ONSRUD MACHINE WORKS, INC.,

0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

WOOlD SHAPER.

Application led January 16, 1928.

This invention relates to improvements in wood shaping machines and the like, and more particularly to improved means for automatically clamping the work when the pieces are carried into cooperative relation with the cutter. This application for patent relates to wood working machines like that disclosed in my Patent No. 1,665,613, Sept. 25, 1928, except that a somewhat later design of machine is shown having a somewhat simplified air valve and a formof clamp which is quickly adjustable in the vertical position.

The main objects of this invention are to provide means whereby the pieces of work may be shaped in a continuous and automatic manner as is required in large quantity production; to provide an automatic Shaper wherein the pieces may be supplied and removed continuously without the necessity of stopping any of the cutting operations; to provide a machine which can be easily set up or adjusted for different sizes and shapes of work; and to provide an improved work clamp and clamp operating device.

An illustrative embodiment of this invention is shown in the accompanying drawings, in which v Figure 1 is a perspective View of the wood shaping machine, shown in operating condition. Y

Fig. 2 is a plan view of one of the pneumatic clamps of the machine shown in Fig. 1.

Fig. 3 is a side elevation of the work clamp withiparts broken away and parts shown in section.

Fig. 4 is a section on the line 4-4 of Fig. 2.

Fig. 5 is a sectional view through'the axis of the work table, showing the pressure distributing valve and connections thereto.

Fig. 6 is a plan View of the valve housing with the cover and valve head removed.

Fig. 7 is a side elevation of the valve head.

Fig. 8 is a bottom plan view of Fig. 7.

The wood shaping machine is supported on a base 10 to which is bolted the rear column 11 and the knee 12. Ther machine is provided with a horizontal, circular work support table14 which is rotatably mounted in suitable bearings 15 provided in the knee 12; and at one side of the column 11 is supported on `laterally extending brackets 16 the vertical cutter arm shaft 17, which may be loosened Serial No. 247,071.

for turning, or locked in position, if so desired. f .Y

Qn the shaft l17 is keyed the cutter arm 18, which may be adjusted vertically by means of the adjusting screw 19. Near the lower end of the shaft 17 is keyed thecontrol arm 20. This arm is provided with a handle 2l for manual adjustment, and the arm is drawn inwardly towards the table by means of a weight which is suspended within the knee casting 12 by means of the cable 21, a latch 22 being provided for holding the lever 20 locked in the outward position.

On the outer end of the cutter arm 18 is mounted a iiuid turbine 23, which is directly. attachedjthe rotary cutter 24. The turbine is supplied with fluid pressure through the flexible supply pipe 25, and is drivenat aY rate of approximately 7200 to the shaft 'of R. P. M., with the cutter turning against the direction in which the wood is fed, with fthe i result that the cutter operates smoothly in thewood regardless of the direction of the grain. On the lower end of the turbine shaft, below the end of the cutter 24 is loosely mounted the guide roll 26 which is provided Y with a steady-rest bearing in the plate 27, the plate beingmounted foi' both horizontal and verticall adjustment in the slideway member `28 which is secured to the cutter arm 18.

The work table 14 is provided with a hole ,low hub BOwhich is iournaled in the bearings 15 of the knee'member; and the tableis driven by means of a worin gear 31 which is keyed to the hub 30 and housed in the hollow portionv32 of the knee. tated by. means of a worm mounted on the right side of the machine,which is thrown into or out of engagement with the Worm gear by means of the control levers 35. The worm is mounted on a shaft which is connected,

The worm gear is ro-` through a suitable speed changing and. conl trolling transmission, to the motor which is mounted on the rear of' the column 11, as is.

more clearly shown and described in the ap- 'p plication referredto above. The model 36, forguiding the cutter `by engagement with the guidewheel 26, is

clamped -to the surface of ther table. VThe periphery of the model may include the outv.

lines of a plurality of different shaped pieces, arranged in a continuous circular manner about the center of the table; and the pieces of work are clamped directly on the model in proper relation with the corresponding guide portions.

At the center of the table is bolted the housing' 40 of the pressure distributing valve. The housing has a conical bore 41 which is closed at the. larger or upper end by means of the cover member 42 which is threaded into the housing 40. The valve head 43 lits freely in the bore, and is pressed downwardly to prevent leakage by means of the pressure which is communicated to the chamber or clearance space 44 at the top end of' the valve member 43. At the lower end of the valve member 43 is rigidlyattached the pipe 45 which extends through a tubular housing member' 46 which projects below the lower end of the bearing 15. The pipe 45 is rigidly connected to the tube 46, at the lower end, by means of the col- Y lar 47; and the tube 46 is held from rotating by means of the pin 48 which is fixed in the tube 46 and engages in a suitable notch 49 v#which is provided in the lower edge of the to the air passage 55 in the centeroi1 the valve head 43.

' The passage 55 extends directly through the center of the valve head, and communi- Cates through a passage 56 to the circumferential segmental groove 57, at one side of the valve head. Directly on the opposite side of the valve head is provided a second groove 58 which is connected to the atmosphere by the passage 59 which opens at the outer or lower end of the head 43. Suitable threaded bosses 60 are provided around the body member 40 in which are provided the communicating passages 61 which open into the bore 41 in alinement with the grooves 57 and 58. l/Vhen relative rotation is caused between the valve body 40 and the valve head 43, the outlet passages 61 are each registered successively, lirst with the fluid pressure through the groove or port 57 and then exhausted through the port 58.

In the arrangement shown, two clamps C are provided on each side of the square .formed by the model which are connected in pairs by means of the lexible tubes 62 and Athe pipe-T 63 to the outlet bosses 60. Since the head is held from rotating while the table is turning, it is obvious that the clamps will be automatically operated as the table rotates, the clamps being' closed when they arepassing the cutter 24.

The construction of the clamps C is as follows: The post 65 is provided with a base 66 which is rigidly secured to the surface of the work table 14. A frame 67 is slidably mounted on the post, and adjusted vertically thereon by means of the adjusting screw 68 which is engaged by the threaded end of the pin 69 which is held in the hub ot the frame 67 by means of the cap screw 70. The adjusting screw 68 is held from longitudinal movement by means of a suitable yoke 71 which engages in the circumferential groove 72 in the end of said screw, and is secured to the post 65.

The iframe. 67 has, formed therein, the air cylinder 73 in which is slidably positioned the piston 74. The stem 75 of the piston 74 projects through the cover 76 of the cylinder 73, and the piston` 74 is pressed downwardly by means of the spring 77 which is disposed between the top o1" the piston and the cover 76. The tubes 62 connect to the bosses 78, which are formed at one side of the cylinder 73 (Fig. 2) and are provided with suitable passages 79 for communicating .the pressure in the tubes 62 to the recesses or clearance space 80 in the bottom of the cylinder 73. Thus when pressure is supplied to the tubes 62, the pistons 74 are forced upwardly; and the pistons are returned by the spring 77 as soon 'as ther pressure has been exhausted.

In each frame 67 is pivotally mounted a work clamp member 81. The member 81 is yoke-shaped and provided with pintles 82 which engage in conforming recesses in the lugs 83 which are integrally formed in the frame 67 at either side of thefpost 65. In the rear end of the. clamp 81 is threaded a post 84 which is held against the upper end of the piston stem 75, by means or" the spring 181 which is tensioned between an adjusting' bolt 182, mounted in the clamp yoke 81, and the lug 183 which is formed on the frame 67. The front side of the clamp 81 is bifurcated and provided with suitable slots 85 for receiving the bolts 86 which serve to clamp the clamp blocks 87 in place. lVhen the air cylinder is exhausted, the clamp member is rotated about the pintles 82 counter-clockwise, as viewed in F ig. 3, by means of the spring 182, to raise the forward end of the clamp for releasing the pieces of work 88.

For yieldably retaining the work in position until the clamps are operated, there is provided spring' pressed plunger 90. This plunger is slidably mounted in a tube 91 which is fixed in a head 92; and at one side of the head 92 is provided a stem 93 which is secured in the collar 94 which is slidably justable on the vertical post 65. The plunger 90 is provided with-a stem 95 which projects through the end of the head 92, the stem being provided with a stop collar 96. The plunger is pressed downwardly by means of the heavy spring 97 which bears-against the In operation, the work table 14 `is'rotatedl continuously and the guide Wheel 26 rides against the profiled edge of the model 36, guiding the cutter in proper relation With the Work. The pieces of Work are forced under the yieldable plungers 90 against suitable gagin g members 98-99 Which are bolted to the model 36, or to the table 14.

At the front side of the table Where the operator stands, the clamps 8l are in their open position and the blocks 87 are raised so that the pieces of Work can be slipped under them. As the Work is carried toWard the cutter, the clamps are automatically closed by the rotation of the valve body 40 about the stationary valve head 43, causing the passage Gl which is connected to the clamp operating cylinder to register With the supply port 57. After the clamp has moved beyond the cutter, the opening of the passage 61 registers With the exhaust port 58. The pressure in the clamp cylinder is relieved andthe Work is released but held in place by the spring pressed detent until removed by the attend-V ant.

IVhile but one specific embodiment of this invention has been herein shoWn and de scribed, it Will be understood that numerous details of the construction shown may be altered or omitted Without departing from the spirit of this invention as defined by the following claims.

I claim:

1. In a Woodworking machine, a base, a Work table rotatably mounted on the base, a plurality of air-operated clamps mounted in circular arrangement on said table, a valve housing mounted on the center of the table and having passages leading to each of said clamps, and a stationary valve in said housing, an exhaust port and a pressure supply port, said ports cooperating successively With said passages to operate the clamps.

2. In a WoodWorkmg machine having a cutter, a Work support, and means for causing relative movement between the cutter and support, a pneumatic Work clamp mounted on the support, and a valve operated by the relative movement between the cutter and support for opening and closing the clamp.

3. In a Woodworking machine -having a cutter, a Work support, and means for causing relative movement betWeen the same; a pneumatic Work clamp mounted on the support, a valvecontrolled by the relative movement betWeenrthe cutter and support vfor opening and closing the clamp, and a spring pressed detent for yieldably holding the Work in relation With the clamp.

t. In combination, a base, a Work support rotatably mounted on the base, a pneumatic Work clamp mounted on the support, a valve for operating the clamp, said valve having tWo cooperating control members, one member being connected to the base and the other member being mounted on the support to movev therewith.

5. In combination a base, a Work support rotatablymounted 'on the base, a pneumatic Work clamp mounted on the support, a valve for operating the clamp, said valve having a housing concentrically mounted on Vthe support and a valve head rotatably mounted in the housing and held against rotation.

6. In combination, a base, a Work support rotatably mountedon the base, a pneumatic Work clamp` mounted on the support, a valve for operating the clamp, said valve including a housing having a tapered bore closed at the largerA end and a tapered valve head mounted in the bore, the housing being eoncentrically mounted on the support and the valve head being held from rotating.

7. In a Wood shaper having a Work table,

a post mounted on the table, a frame slidably mounted on the post, an arm pivotally mounted on the frame, means mounted on the frame for operating the arm to clamp pieces of Work on the table, and means comprising a screW journaled in the postiforA positively adjusting the height of the frame from the surface of the table, so that pieces of different thicknesses may be clamped to the table by substantially the same amount of movement of the clamp arm. l

8. In a Wood shaper having a Work table, a post mounted on the table, a frame having an air cylinder formedtherein, the frame being slidably mounted on the post, a Work 1 clamp arm -pivotally mounted on the frame,

a piston slidable in the cylinder and connected to the arm for operating the same, and meansfor adjusting the vertical height ofthe frame so that pieces of Work of different thicknesses may be clamped to the table by substantially the same movement of the arm. Y

Signed at Chicago this 10th day of January,1927. s Y

osoAn oNsRUD. f 

